Rotary reciprocating pumpd drive



2 Sheets-Sheet l E. D. TAYLOR Eugene 0. Taylor mmvroze.

June 2, 1953 ROTARY RECIPROCATING PUMP DRIVE Filed Jan. 17, 1950 June 1953 E. D. TAYLOR 2,640,362

ROTARY RECIPROCATING PUMP DRIVE Filed Jan. 17, 1950 2 Sheets-Sheet 2 Eugene D. Taylor INVENTOR.

Patented June 2, 1953 UNITED; STATES PATENT OFFICE 2,640,362 ROTARY RECIPROCATING PUMP DRIVE 7 Eugene D. Taylor, Kenosha, Wis.

Application January 17, 1950, Serial No. 138,960

This invention appertains to a pump construction for use in the processing of food and is particularly designed for use in the dairy industry, in processing milk and other dairy products.

The primary object of the instant invention is to reduce the'number of parts that come in contact with the food product being processed, so as to decrease the possibility of bacterial damage thereto.

Another important object of this invention is to enable the pump to be easily assembled and disassembled, so that the parts may be easily removed for cleaning, whereby better sanitation is achieved.

Another important object of this invention is to provide a rotary reciprocating pump, especially designed for use in processing foods.

A meritorious feature of this invention resides in the provision of a piston, which is reciprocated to perform a pumping function, and which is rotated on both strokes thereof, so; as to function as a valve for controlling the inlet port and outlet port.

These and ancillary objects and additional structural features of merit are attained by this invention, the preferred embodiment of which is set forth in the following description and illustrated in the accompanying drawings, wherein:

Figure 1 is a longitudinal vertical sectional view through the pump housing and housing for the actuating means therefor, the pump housing being detachably secured to the housing for the actuating means;

Figure 2 is a transverse sectional view taken on line 2-2 of Figure 1;

Figure 3 is a transverse sectional view taken on line 33 of Figure 1, and,

Figure 4 is a view in perspective of the piston.

In the accompanying drawings, the piston type valveless pump H3, constructed in accordance with the principles of this invention, includes a housing 2 for the operating means I4 for the pump. The operating means includes a drive shaft [6 which is rotatably journaled in the lower end of the housing, the shaft having its inner end journaled in a bearing socket l8, which is formed laterally on the front wall of the housing. The shaft extends through an opening 22 in the rear wall 24 of the housing and is mounted in suitable bearings.

A drive gear 26 is fixed on the shaft, the gear 26 being disposed in meshing engagement with a gear 28 slidably mounted on a driven shaft 30, disposed parallel to the drive shaft 16. The shaft 30 is rotatably mounted at one end in a bearing 2 Claims. (CI. 7422) 32 extending laterally from the rear wall 24 of the" housing. The shaft 38 extends through a bearing 34 in the front wall 2!] of the housing and projects outwardly beyond the front wall.

A ring 35 is disposed concentrically on the shaft and abutsagainst the front Wall 20 of the housing, the ring being formed on its face with a projecting annular flange 38 to receive a compressible sealing ring 49. A sectional casing 42 is detachably mounted on the front wall 2!] of the housing and the front wall is formed at its upper and lower ends with lateral flanges 44 and 46 which are transversely bored and threaded from their front faces as at 48. The inner portion of the projecting flange 50 from the front wallis recessed at its inner circumference to form an annular shoulder 52, which seats the closed end 5d of the circular casing. A detachable front wall 56 is provided for the casing i2 and the inner part thereof is formed with a seat 58 to abut against the edges of the side walls and form a tight joint. The wall 56 is formed with enlarged transversely apertured portions 59 through which tie bolts 60 pass, the tie bolts being threadingly engaged in the bores 48 in the flanges 44 and 46 of the housing.

' The shaft 30 is formed at its rear portion with a longitudinal slot 62, the gear 28 having a key 64 slidably disposed in the slot, so that the shaft may slide longitudinally through the front wall of the housing and at the same time be rotated by the shaft 16 and intermeshing gears 26 and 23.

Means is provided for reciprocating the shaft 36 and is responsive to the rotation of the shaft [6. The means is mounted on the shaft [6 and includes a cam 64 which is concentrically disposed on the shaft IS, the cam being adapted to rotate in a channel or cam track 66 in a U-shaped member 63. The web portion of the U-shaped member 68 is keyed by a pin 10 to web portions of an upstanding U-shaped member E2, the member 12 embracing the lower portion of a bearing assembly M and having the terminals of its upstanding ends formed with transverse openings 16 within which pins 18 are mounted, the pins 18 extending laterally from the outer race of the bearing assembly. The inner race 82 of the bearing assembly is keyed by a transverse key 84 to the shaft 30. Thus, as the cam 64 rotates in the cam track 65, the member 68 is oscillated and the movement of the member '68 is transmitted to the U-shaped member 2 and thus to the shaft 30.

A piston 86 is detachably mounted on the outer end 83 of the shaft 30, the end 88 being reduced axially and the shaft being formed with a rectangular shoulder 90 adapted to fit in a rectangular counterbore 92 in one face of the piston.

The piston 85 includes a block 94, having opposing curved sides 85 and opposing flat sides 98. The block is formed with the counterbore 92 in one end thereof, the opposing ends being flat, and a passage I00 extends axially through the block.

Semi-circular extensions I02 and H14 extend in opposite directions from the opposing" edges" of the side'sfiB; the outer or unattached edgesof' the extensions being slidably disposed and in sliding contact with the inner surface of the Circular walls of the casing 42. .;'Ihe shelf-n30 terminates in an externally threaded end' IE6, with a nut Hi8 being threaded thereon tolo'cli th'e'piston against the shoulder 90.

The casing 52 is formed at its opposing side with an inlet I 13 and an outlet 1 l2, the inlet-and outlet being longitudinally spaced and transversely opposed; so that-- theextensions- NZ-and Hit-0n theblocktfi are alternately inclosing engagementof the inletiand-outleti Itisto be especially noted that-the pump casing isy easily and readily attached to the housing and can be quickly removed, with the pump consisting; of only one part, namely, the piston so' that it may be easily removed from the shaft and quickly and completely cleaned and sterilized-.-

Having described the invention, what claimed as new is;

l. A rotary reciprocating pump comprising a housing, la'drive-shaft rotatablyjournaled .in said housing, adriven-shaft for the pumppiston journaied insaid housing-and in offset-parallel relation to-said driveshaft igear meansactuatedby the driveshaft for rotating the driven shaft in response-to rotation of said drive shaft,- ,and means interconnecting said I drive and driven shafts for effecting reciprocation of saiddriven shaft'in -response to rotation of said driveshaftsaid last named imeans including a cam disk secured to said drive shaft for rotationtherewith, said-cam= dish lyingin-aplane forming anacute angle withthe axis of said drive shaft, a yokemember engaged r on a peripheral portion ofsaid disk for pivotingimovement in response to rotationof saiddisk, said =yokemember' having 'its upper end'pivotal-ly and rotatablyconnected: tosaidcdrivenshafts-for effecting reciprocation of said driven shaft in response to rotation of said drive shaft,

said lastvnamed means including a cam disk secured to saiddrive shaft for rotation therewith,

said camdi'sk lying in a plane forming an acute angle-with the axis of said drive shaft, a yoke member engaged on a. peripheral portion of said disk for pivoting movement in response to rotation of said disk,-said'- yoke member having its upper end pivotally and rotatably. connected to said driven shaft whereby rotation of said driveshaft I effects pivoting movement of said yoke member and whereby said driven shaft can be reciprocated at, thesame time said gear means effects rotation ofsaid (driven shaft, said yoke member including a pair of U-shaped elements disposed inback to back relati0n,. a pininterconnecting said elements, one of. said Ushaped elements rotatably receivingsaid peripheral portion ofsaidcam? disk, abea'ring'on said driven shaft, said otherU-shaped element pivotally'andremcvably connected to said bearing.

EUGENE D. TAYLOR References" Cited in the file of this patent UNITED STATES PATENTS Number Name Date 1 ,222,481 Smith Apr; 10, 1917 1,635,757 Storck Sept. 25, 1928 ZfiEZg tIQ- Kortin'g' Dec. 1, 1936 V FOREIGN PATENTS Number Country Date 215,257 reati Britain' May 8, 1924; 54 23213 France Aug. 8; 1922 

